/* TimeHub - 布局样式 (导航栏、页脚、容器) */
/* 版本: 1.0 */

/* ===== 容器布局 ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ===== 导航栏 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--surface-color);
  box-shadow: var(--shadow-sm);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-icon {
  font-size: 1.25rem;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover {
  background-color: rgba(67, 97, 238, 0.1);
}

.nav-link.active {
  background-color: var(--primary-color);
  color: white;
}

/* 主题切换按钮 */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  background-color: transparent;
  color: var(--text-color);
  transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
  .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }
}

.theme-icon {
  font-size: 1.25rem;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  background-color: transparent;
  color: var(--text-color);
}

.menu-icon {
  font-size: 1.25rem;
}

/* ===== 页脚 ===== */
.footer {
  background-color: var(--surface-color);
  background-image: linear-gradient(to bottom, rgba(67, 97, 238, 0.03), transparent);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  margin-top: auto;
}

.footer-content {
  text-align: center;
  color: var(--text-secondary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ===== 页脚内容布局 ===== */
.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  text-align: left;
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-color);
  margin: 0 0 var(--spacing-sm) 0;
}

.footer-description {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links li {
  margin: 0;
  position: relative;
  padding-left: 1.2rem;
}

.footer-links li::before {
  content: '→';
  position: absolute;
  left: 0;
  top: 0.5em;
  color: var(--primary-color);
  opacity: 0.6;
  transition: opacity var(--transition-fast);
  font-size: 0.8rem;
}

.footer-links li:hover::before {
  opacity: 1;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
  display: inline-block;
  padding: var(--spacing-xs) 0;
}

.footer-links a:hover {
  color: var(--primary-color);
  transform: translateX(4px);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-sm);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-round);
  background-color: rgba(67, 97, 238, 0.1);
  color: var(--primary-color);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.social-icon {
  font-size: 1.125rem;
}

/* ===== 响应式页脚 ===== */
@media (max-width: 1024px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
}

@media (max-width: 640px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
  }

  .footer-section {
    text-align: center;
    align-items: center;
    padding: var(--spacing-md) 0;
  }

  .footer-title {
    font-size: 1.125rem;
  }

  .footer-description {
    font-size: 0.8125rem;
    line-height: 1.4;
    max-width: 280px;
    margin: 0 auto;
  }

  .footer-links {
    gap: var(--spacing-xs);
  }

  .footer-links a {
    font-size: 0.8125rem;
    padding: var(--spacing-xs) 0;
  }

  .footer-links a:hover {
    transform: translateX(0);
  }

  .footer-bottom {
    padding-top: var(--spacing-md);
    font-size: 0.75rem;
  }
}

/* ===== 主内容区域 ===== */
.main-content {
  flex: 1;
  padding: var(--spacing-xl) 0;
}

/* ===== 响应式布局 ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .theme-toggle {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  /* 移动端底部导航优化 */
  .mobile-bottom-nav {
    padding: var(--spacing-xs) 0;
  }

  .bottom-nav-icon {
    font-size: 1.125rem;
    margin-bottom: 1px;
  }

  .bottom-nav-label {
    font-size: 0.6875rem;
    font-weight: 500;
  }
}

/* ===== 移动端菜单 ===== */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  display: none;
}

.mobile-menu.show {
  display: flex;
}

.mobile-menu-content {
  width: 80%;
  max-width: 300px;
  background: var(--surface-color);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.mobile-nav-link {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  font-weight: 500;
  color: var(--text-color);
  transition: background-color var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background-color: rgba(67, 97, 238, 0.1);
  color: var(--primary-color);
}

/* ===== 移动端底部导航 ===== */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-sm) 0;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
  text-decoration: none;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.bottom-nav-item.active {
  color: var(--primary-color);
}

.bottom-nav-icon {
  font-size: 1.25rem;
  margin-bottom: 2px;
}

.bottom-nav-label {
  font-size: 0.75rem;
  font-weight: 500;
}

@media (max-width: 768px) {
  .mobile-bottom-nav {
    display: flex;
  }
}